24" X 24" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 26 5/8" X 26 5/8"] Grille is fireproof and ensures efficient

is fireproof and ensures efficient thermal performance

How To Measure A Grille

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creating a quiet and efficient environment

actual front end outer dimensions are approximately 22 5/8" width X 16 5/8" height

24" X 24" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 26 5/8" X 26 5/8"] Grille is fireproof and ensures efficient+ Product Details Size 24"w X 24"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 26 5 8" width X 26 5 8" height Actual Filter Size 23 3 4"w x 23 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.